Increased hypertension worldwide

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Stephen Reinberg
HealthDay Reporter

Tuesday, January 10, 2017 (HealthDay News)-A new study claims that as the number of people around the world with elevated or high blood pressure increases, so does the number of deaths associated with this “silent killer.” doing.

According to an international analysis of about 9 million people, the incidence of hypertension (hypertension) and hypertension (prehypertension) soared between 1990 and 2015.

“There are about 900 million people with hypertension in the world, and about 3.5 billion people with high blood pressure that do not fully meet the definition of hypertension,” said Christopher Murray, the lead author of the study. I will. He directs the Institute for Health Metrics and Evaluation at the University of Washington in Seattle.

“Blood pressure is a major cause of premature death and disability in the world,” Murray said.

Blood pressure is made up of two numbers. The top number, called systolic blood pressure, measures the pressure in the arteries as blood is pumped from the heart. The lowest number, diastolic blood pressure, measures the pressure between heartbeats. Blood pressure is expressed in millimeters of mercury (mm Hg).

The authors of the study state that even systolic blood pressure within what is considered normal (less than 120/80 mm Hg according to the American Heart Association) can increase the risk of heart attack and stroke. ..

In this study, systolic blood pressure of 110-115 mm Hg was considered to be elevated, and 140 mm Hg and above was considered hypertension.

According to study co-author Dr. Gregory Ross, researchers are looking to look at blood pressure of 110-115 mm Hg (well below the clinical definition of high blood pressure) because it is where the risk of high blood pressure begins. I have selected.

“The definition of hypertension is systolic blood pressure above 140 mm Hg, but there is very strong evidence that the risk of hypertension begins above 115 mm Hg,” said an assistant professor of cardiology at Washington University. Ross says. Washington, Seattle.

What is lacking is evidence that people with blood pressure of 115-140 mm Hg need to take medication to lower their blood pressure. There are other ways to control blood pressure, such as choosing a healthy lifestyle and maintaining a normal weight, Ross said.

According to Murray, some of the causes of the increase in high blood pressure worldwide are unhealthy diet and obesity. Moreover, in developing countries, more people live in cities and have less physical activity.

Murray also explained that the world’s population is aging and blood pressure often rises with age.

“Hypertension affects and exacerbates so many people, yet there are effective preventions from lifestyle changes and various effective medical treatments to control blood pressure.” He said.

The number of people with systolic blood pressure of at least 110-115 mmHg is likely to continue to increase, the study authors added.

One heart expert pointed out that one day there was no normal blood pressure and the next day there was high blood pressure.

“The traditional notion that there is a threshold when transitioning from normal blood pressure to hypertension is not accurate,” said Dr. Mark Krieger. He directs the Cardiovascular Center at the Dartmouth-Hitchcock Medical Center in Lebanon, New Hampshire.

“The risk of starting with a blood pressure much lower than 140 mmHg gradually increases. It should be noted that even people with lower blood pressure have an increased risk,” Creager explained.

For the study, the researchers reviewed 844 studies from 154 countries. The study was published from 1980 to 2015 and was attended by approximately 8.7 million people.

During these years, the annual mortality rate of patients with systolic blood pressure of at least 110-115 mm Hg increased from 136 to 145 per 100,000. Researchers have found that in patients with systolic blood pressure ≥140 mm Hg, the annual mortality rate increased from 98 to 106 per 100,000.

Most blood pressure-related deaths were caused by heart disease (5 million), cerebral hemorrhage (2 million), and stroke (1.5 million).

According to the study, five countries (US, China, India, Indonesia, Russia) accounted for more than 50% of hypertension or hypertension cases.


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Source: Christopher Murray, D. Phil. , Director, Institute for Health Metrics and Evaluation, University of Washington, Seattle. Gregory Ross, MD, Associate Professor of Cardiology, University of Washington, Seattle. Dr. Mark Krieger, Former President of the American Heart Association, Cardiovascular Center, Dartmouth Hitchcock Medical Center, Lebanon, New Hampshire. January 10, 2017, Journal of American Medical Association

Increased hypertension worldwide

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